Specifications include, but are not limited to:. Provide a contract for the purchase of emergency lights and sirens for us by the Hall County’sSheriff’sDepartment.County prefers to accept proposals from vendors with (5) five years experience minimum; however, this factor and the following will be studied to assist the County in deciding the most favorable vendor: A. Number of years in business; B. Firm’s organization / management structure; C. Firm’s facilities and equipment; D. Firm’s experience in doing the same type contracts; E. References; F. Contracts of like nature currently being performed; G. Number of professional staff available for this contract; H. Number of standby or temporary professional staff available for emergencies that might arise during the life of the contract.